$(function(){
	var clientWidth = $(window).width();  // 获取浏览器宽度
	var clientHeight = $(window).height(); // 获取浏览器高度
	$('.leftDiv').width(clientWidth/2).height(clientHeight).animate({'left':-clientWidth/2},2000);
	$('.rightDiv').width(clientWidth/2).height(clientHeight).css('left',clientWidth/2).animate({'left':clientWidth},2000);
})